/*
 * Copyright 2006-2018 The MZmine 2 Development Team
 * 
 * This file is part of MZmine 2.
 * 
 * MZmine 2 is free software; you can redistribute it and/or modify it under the terms of the GNU
 * General Public License as published by the Free Software Foundation; either version 2 of the
 * License, or (at your option) any later version.
 * 
 * MZmine 2 is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
 * even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License along with MZmine 2; if not,
 * write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
 * USA
 */

package net.sf.mzmine.modules.visualization.scatterplot.scatterplotchart;

import java.text.DecimalFormat;

import org.jfree.chart.labels.XYItemLabelGenerator;
import org.jfree.data.xy.XYDataset;

public class DiagonalLineLabelGenerator implements XYItemLabelGenerator {

  // We use 3 decimal digits, to show ratios such as "0.125x"
  public static final DecimalFormat labelFormat = new DecimalFormat("0.###");

  /**
   * @see org.jfree.chart.labels.XYItemLabelGenerator#generateLabel(org.jfree.data.xy.XYDataset,
   *      int, int)
   */
  public String generateLabel(XYDataset dataSet, int series, int item) {

    DiagonalLineDataset diagonalDataSet = (DiagonalLineDataset) dataSet;

    double doubleFold = 0;
    switch (series) {
      case 0:
        doubleFold = diagonalDataSet.getFold();
        break;
      case 1:
        doubleFold = 1d;
        break;
      case 2:
        doubleFold = 1d / diagonalDataSet.getFold();
        break;
    }

    String label = labelFormat.format(doubleFold) + "x";

    return label;

  }
}
